Pressure fluid controlling device



March 16, 1948. P. A. LINCOLN l 2,437,855A

IRESSURE FLUID CONTROLLING DEVICE'- Filed March 17, 1943 .sa 5 48 .fo Kia 5E 47 W/// if 45 L \\\\\\\\\x .1 ---a7 J .-r'i f' 33 44 VLVN`49 25 5? alle .34 45 5, az

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Patented Mar.. 16, `1948 PRESSURE FLUm coN'raoLuNG DEVICE Paul A. Lincoln, Bloomsbury, N. J., assignor to Ingersoll-.Rand Company, New York, N. Y.. a

corporation of New Jersey A Application March 17, 1943, Serial No.,479,455

1 Claim.

This invention relates to fluid actuated machines, as for example a rock drill, and more particularly to a pressure fluid controlling device for controlling communication between pressure fluid supply and a plurality of different chambers of machines of this type.

One object of the invention is to facilitate the operation of the valve means serving to control communication between pressure uid supply and such chambers.

A. more specific object is to enable a pair of throttle valves to be manipulated by a single actuating member in such wise that pressure uid lmay be valved selectively to one or to both of a pair of chambers.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawings accompanying this specication and in which similar reference numerals refer to similar parts,

Figure 1 is a side elevation of a rock drill of the stoper type equipped with a pressure fluid controlling deviceconstructed in accordance with the practice of the invention,

Figure 2 is a vertical view, partly broken away,

of the pressure fluid controlling device and pore tions of the rock drill utilizing such pressure fluid,

Figure 3 is a plan view, in section, taken through Figure 2 on the line 3-3 looking in the direction of the arrows, and

Figures 4 and 5 are transverse views taken, respectively, on the lines 4 4 and 5-5 through Figure 2.

Referring more particularly to the drawings, the invention is shown applied to a rock drill 2|) of the stoper type having a pair of coaxially arranged cylinders '2l and 22 that are separated by the controlling device, designated in general by 23.A

The cylinders 22 and 2| are clamped to the controlling device 23 by side rods 24, in a manner well known, and in the cylinder 2| is a percussive element or hammer 25 for actuating a working implement 26. The feeding cylinder 22 houses a piston 21 having a rod that projects from the free end of the cylinder and carries a, pointer 28 for engagement with a surface 29 to support the rock drill.

The controlling device 23 comprises a casing 30 having a boss 3| at one end to extend into the cylinder 22 for centralizing these parts with respect to each other, and a plate 32 in the opposite end of the casing extends into the cylinder 2| for holding said cylinder in coaxial relationship with the casing 30 and the cylinder 22. The casing 30 is recessed to form a supply chamber 33 for pressure uid that may be introduced thereinto through a supply port 34 inthe casing 30.

A throttle valve 35 in the form of a cylindrical,

flat plate is arranged at one end of the chamber tion of the chamber 33 by a ledge 40 on the wall of the chamber 33.

The supply of pressure uid to the cylinder 22 is controlled by a separate throttle valve 4|'. Thisthrottlevalveis also rotatable and is arranged in a bushing 42 in the side of the casing 30 to provide a bearing surface 43 for said throttle valve. The throttle valve 4| is of the plug type. It is arranged perpendicular to the axis of rotation of the throttle valve 35 and has an end 44 proje'cting exteriorly of the bushing to receive a lever 45 whereby the valve may be rotated. The lever 45 is held on the end 44 by a nut 46 and carries a detent 41 shown as a spring pressed ball for engagement with depressions 4B in the outer end of the bushing 42 to lock the throttle valve 4| against unauthorized rotary movement.

The inner end of the valve 4| extends into the chamber 33 and has an axial passage 49 that opens into the chamber 33 and communicates at its outer end with a radial port 5U leading to the periphery of the throttle valve. 'I'he port 50 is positioned t0 register, in what may be termed the open position of the throttle valve 4|, witha supply passage 5| leading to the cylinder 22 through the bushing 42 and the casing 30.

The throttle valve 4| also serves to control the exhaust of pressure uid from the cylinder 22. It accordingly has a. groove 52 extending along its surface to establish communication between the supply passage 5| and with an atmospheric exhaust port 53 in the lever 45.

To the end` that the throttle valves may be manipulated in a. simplified manner and with a minimum of actuating elements said valves are provided with means that cooperate with each other for transmitting rotary movement from one valve to the other, 'in the example shown, from the valve 4| to the valve 35. The throttle valve 35 is accordingly provided with gear teeth 54 on its exposed endV surface for engagement with gear teeth 55 projecting from the periphery of an enlargement 56 on the inner end of the throttle valve 4 i.

In the drawings only three gear teeth are shown on each throttle valve but it is to be understood that the number may vary with the range of rotative movement of the valves required for establishing registry of their ports with the passages they control.

In order that the valve 4l may serve the additional function-of a lock for the valve 35 when their teeth are out of engagement with each other and, at the same time, to permit rotary movement oi' the throttle valve 4| relatively to the valve 35. the latter valve is provided with an arcuate, radially extending groove 51 to receive the blank peripheral surface 58 of the enlargement 56. The radial edge 59 of the groove 51 adjacent the toothed portion of the throttle valve 35 preferably lies inside of the end surface of the said valve 35, and the blank portion of the enlargement 55 is notched as at 50 to prevent locking engagement of the edge 59 on the enlargement 56 during the rotation of the throttle valves.

The operation of the device is as follows: Whenever it is intended to operate the rock drill and with the throttle valves in the positions shown in Figure 5, the valve lil is first rotated to a position to place the port 50 in registry With the supply passage 5|. The pressure uid thereby admitted into the feeding mechanism will extend it and press the pointer 23 firmly against the surface 29 and the working implement 26 against the work. This movement of the valve 4I may take place without disturbing the position of the throttle valve 35 since the gear teeth of the valves will then be out of engagement with each other and the valve 35 will be held in its closed position by the blank portion of the enlargement 58.

By rotating the valve 4l to the position required to establish registry of the port 50 with the supply passage 5i its toothed segment will be carried to a position to mesh with the teeth of the valve 35. Thus, when the valve 4| is rotated further in the direction described, its teeth will engage those of the valve 35 and cause the latter to be rotated to a position wherein the port 3E registers with the supply passage 31. Pressure fluid will then i'low from the chamber 33 to the distributing valve mechanism of the rock drill for distribution to the cylinder 2l.

From the foregoing description it will be seen that the entire drilling mechanism will ilrst be extended to place it in the correct operative position and that the percussive element is next set in operation. Conversely, when it is intended t0 discontinue drilling and to remove the drilling mechanism to another site, the throttle valve 4I is rotated in an opposite hand direction to that previously described. During its initial movement in this direction the valve 35 will also be rotated since its teeth are intermeshed with those of the valve Il and will be carried to a position to cut-oi! the admission of pressure iluid to the percussive element While pressure fluid is still entrapped in the cylinder 22.

Upon further rotation of the valve 6l in the same direction its teeth will move out of mesh with the teeth of the valve 35. The latter will then be held against rotation by the enlargement 56 and the wall of the groove 51. When the valve 4I reaches the posit-ion in which the groove 52 registers with the supply passage 5i the pressure Y fluid in the cylinder 22 will escape to the atmosphere and the drilling mechanism may then be contracted for transportation to another drilling site.

I claim: y

In a pressure fluid controlling device. the combination of a casing having a reservoir for pressure fluid and a pair of outlets and an inlet for the reservoir, a throttle valve of the rotary plate type to control communication between the reservoir and one of the outlets, teeth on a portion only of the periphery of the throttle valve, a rotary plug valve arranged perpendicularly to the axis of rotation of the throttle valve capable of movement independently of the throttle valve and having a passage to afford communication between the reservoir andthe other outlet, and teeth on the end of the plug valve for selective engagement with the teeth on the throttle valve for transmitting rotary movement from the plug valve to the throttle valve.

PAUL A. LINCOLN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 205,802 Rousseau June 25, 1878 1,063,598 Richards June 3, 1913 1,172,238 Gilman Feb. 15, 1916 1,256,759 Wilson Feb. 19, 1918 1,586,205 Levine May 25, 1926 2,008,911 Hodgkin July 23, 1935 2,113,925 Peerstone Apr. 12, 1938 2,178,182 Mellinger Oct. 31, 1939 2,292,963 Nardone Aug, 11, 1942 

